Brahma was amazed to see little Krishna perform wonderful feats. He thought of a plan to test him.

One day, while Krishna was out with his friends tending the cattle, he found them all disappearing one by one. Seeing the field getting empty this way, Krishna was surprised. He immediately understood that this was the doing of Lord Brahma. But he did not want to return without his friends and cattle as it would make their parents anxious. To convince Brahma of his ability, Krishna started expanding into various forms. As he was god himself, Krishna could take on any from he desired. In a while the entire field was again crowded with all his friends.  The calves too appeared, some mooing and some grazing the fields. It looked exactly the same as before.

Brahma was startled. He realised Krishna's immense powers and showered flowers from the heavens above.